Elevator-motor-controlling device



(No Model.) 2 Sheets-Sheet 1.

P. E. HBRDMAN.

- ELEVATOR MOTOR CONTROLLING DEVICE. No. 568,568.

Patented Sept. 29,1896.

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Patented Sept. 29, 1896.

Inventor.

VVitnesses.

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FRANK E. HERDMAN, OF \VINNETKA, ILLINOIS.

ELEVATOR-MOTOR-CONTROLLING DEVICE SPECIFICATION forming part of LettersPatent No. 568,568, dated September 29, 1896.

Application filed October 5, 1895.

To all whom it may concern.-

Be it known that I, FRANK E. HERDMAN, a citizen of the United States,residing at Winnetka, county of Cook, and State of Illinois, haveinvented a new and useful Improvement in Elevator-Motor- ControllingDevices, of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, which form a part ofthis specification.

Speaking generally, this invention has for its object means andmechanism whereby the strength of the field in the motor atpredetermined points in the travel of the elevator is automaticallyincreased, so that thereby the speed of the motor and car would bedecreased, and this independent of the motor-operating mechanism. Thisis intended to be used shortly before the end of the travel of the carin either direction and so as to bring the car to a slow speed beforebeing brought to a full stop either by automatic devices or by movingthe motor-operating mechanism by hand.

The generic invention, of which the sub ject-matter of this applicationforms a specific embodiment, forms the subjectmatter' of certain patentissued to me October 29, 1895, No. 548,830, and the invention thereindescribed is generically claimed, and I intend in this application todescribe and claim a specific embodiment of the generic inventiondescribed and claimed in the before mentioned application.

I will first describe this invention as illustrated in the drawings andthen specifically point out the same in the claims.

In the drawings, Figure 1 is a side elevation of elevator mechanism, andFig. 2 is an electrical diagram.

A is the elevator-car; B, the lifting-cable, which passes up over thesheaves b b and down, and is connected to the frame O, carrying thesheave D.

F is a cable, one end secured at f to the bottom of the shaft, andpassing around the sheave 1) around a sheave F upon the shaft 6 ofelectric motor E. The cable then passes up over the sheave b on the topof the shaft down around the sheave G upon the top of frame H.Frictional contact between the cable F and sheave F is maintained by theframes 0 and II, and the sheaves F and D are Serial No- 564,733. (Nomodel.)

so adjusted as to reduce the speed transmitted by the motor to the car.This arrangement of driving the car from the shaft of motor E-withoutthe use of worm and gear forms the subject-matter of another applicationfiled by me October 5, 1895, Serial No. 564,732.

At a point on the shaft near the lower end thereof, and When it isdesired to slow down the speed of the car, is placed a switch a. Thisswitch consists in the brush g and the arms or projections b 0, and d,the projection 0 being in line with the projection f, carried by frameO, and the projection b in line with projection 6', carried by car.

j is a long contact, and h and 2' two short contacts. \Vhen the switchis central, the brush g rests on contact j, but is free from contacts 2'and h. lVhen moved in one direction, brush 9 makes contact with contactsj and h and in the other direction with contacts j and 2'.

Connected to the motor-operating shaft P is a crank or lever P carryinga brush P insulated therefrom.

3 is a long contact, and 1 and 2 short contacts. WVhen the shaft I iscentral, the brush P is in contact with contact 3, but free fromcontacts 1 and 2. When the shaft is moved in one direction, the brushmakes contact with contacts 1 and 3, and when moved in the otherdirection with contacts 2 and 3.

Contact 1 and contact 7b are in electrical connection, and contact 2 andcontact i are also in electrical connection.

The circuit to the armature and field of the motor is admitted throughresistance devices controlled by a resistance-ar1n in the followingmanner: X is a snap-switch having the blades a a a a the blades a and abeing in electrical connection with each other through the conductiveportion a of the hub of the snap-switch X, but insulated from thebrushes a and a by the'insulation the brushes a and a being insulatedfrom each other by insulation c The brush a in the movement of theswitch in one direction makes contact with contact a and in the otherdirection with contact a So brush a makes contact with a and a, brush awith contacts a and a brush a with contacts a and a The contacts a andand a ICO rent supply passes to the conductive portion a of the hub ofthe snap-switch X, making therefore direct electrical connection fromone pole of the current supply to both the brushes e and a. Contacts aand a are in electrical connection, and so are contacts (17 and a. Fromcontact a" a wire leads to the resistz'mce-arm solenoid a and from saidsolenoid a wire leads to the resistancenan \V, and from said arm a wireleads to the other pole of the source of current supply. From thecontact a a wire leads to one side of the hold, and from the other sideof the hold a wire leads to the contact a. From the brush a a wire leadsto the field-resistance \V, in electrical connection with the brush \V,in electrical connection with the arm XV. From the contact a a wireleads to one side of the armature, and from the other side of thearmature a wire leads to the contact a", and from the brush a a wireleads to the armattire-resistance .V, in electrical connection with thebrush \V, by l'QSiSi'fliltfO-tllll TV. From the arm \V a wire runs tocontact 3, and from non-resistance portion W of field-resistance \V awire runs to contactj. Now where it is desired that the car shallascend, the operating-shaft is moved in the proper direction to causethe current to be admitted to the motor to cause it to revolve in theproper direction. This causes the brush 1" to be moved so as to be incontact with contacts 1. and 3. The car now ascends, the motor operatingin the ordinary manner, the arm w being moved by solenoid a until it isupon the portion W of the resistance-plate V, and current passing to thehold through resistances. This continues until the frame 0 has moved adistance, (its travel being equal to the travel of the car,) so that theprojection f strikes the arm G, which swings or revolves the switch, sothat the brush g makes contact with contacts h and j, and at once acircuit independent of the resistances is completed to the Held, and thestrength of the licld is increased and the speed of the motor and cardecreased. The movement of the projection is such that it passes beyondthe projection or arm 0, and in the return movement (when the movementof the car and frame 0 are reversed) the projection f strikes theprojection or arm (Z, returning the switch to its normal condition andcutting out this circuit to the field. \Vhen the operating'slnrtt 1moves so as to cause the car to descend, the brush P is brought incontact with contacts 52 and 3, and when the car has descended to itsproper point of travel the projection c in the car strikes the arm orprojection U making connection between the brush 9 and contacts 2' andj, and again the circuit to the Jield is made independent of. theresistances. The switch is turned by the projection c in the reversedmovement of the car striking the projection d and cutting out thiscircuit to the field.

. I can, if desired, instead of having a double switch a at the bottomof the shalt, have two switches, one at the top and the other at thebottom of the shaft, and control and operate both switches by means oi.a projection either upon the car or carried by the frame U.

Beneath the switch a is a pivoted lever I, connected by a link Z with acrank or lever it, upon the operatiugshaft l \Vhen the shaft 1? iscentral, the lever is in the position shown in full lines. \Vhen it ismovedv so as to cause the car to ascend, the lever is in the left-handdotted-line position, and when it is moved to cause the car to descendthe love r is in the right-hand dotted-line position, taking theposition for the car to descend. "When the car has descended so that theprojection c strikes the arm or projection. h the switch a is operatedand the motor slowed down. The further movement oi. the car causes it topass beyond. said switch until the projection estrikes thclever Z,returning it and the operating-shaft to their central position andstopping the motor. When the lever is in the left-hand dotted-lineposition, the car ascends until the projection j" strikes the arm orprojection 0, when. the switch a is open-tied and the motor and carslowed down. The in rther movement causes the projection f to strike thelever 7, returning it to its, and the operating-shalt to its, centralposition, slop-- ping the motor. by this arrangement lam enabledautomatically, at the end oi. the travel of the car in. eitherdirection, to lirst bring it to a slow speed and then cut oil. thepower.

Having now fully described my invention, what I claim, and desire toprotect by letters Patent, is-

1. The combination with an elevating apparatus and an electric motor foroperating the same, of a source of current supply, elec tricalconnection between the source of current supply and held of the motor, aresist ance device in said circuit, a shunt-circuit to the fieldimlependent of the resistance device, said last -mentioned circuit beingnormally open, switches in. said last-mentioned circuit, one controlledby the motoreontrollincmechanism and the other in al incment with theoperating mechanism, and adapted to be struck by said inecln'mism in.its movement.

2. The combination with an elcvz'iting api paratus and an electric motorfor operating the same, of a source of current supply, electricalconnection between the source oi current supply and the held of themotor, a resistance device in said circuit, a shun t-circuit to thelield independent of the resistance dc vice, said last-mentioned circuitbeing normally open, switches in said last-mentioned circuit, onecontrolled by the motor-controt ling mechanism and the other inalinement with the operating mechanism and adapted to be struck by saidmechanism. in its movement, a lever connected with the switch devicecontrolled. by the motor controlling mechanism in path of movement ofthe elevating apparatus and adapted in the movem ent of the elevatingapparatus to be struck by it, returning the switch and motor-controllingmechanism to its central position.

3. The combination with an elevating apparatus and an electric motor foroperating the same, of a source of current supply, electrical connectionbetween the source of current supply and field of the motor, aresistance device in said last-mentioned circuit, a shunt-circuit to thefield independent of said last-mentioned circuit, a contact as 3 inelectrical connection with one side of said shuntcircuit, a contact as jin electrical connection with the other side of said shunt-circuit,contacts as 1 and 2 and h and 01, contact 1 being in electricalconnection with contact h, and contact 2 being in electrical connectionwith contact i, a brush controlled by the motorv controlling mechanismand adapted, dependent upon the direction of movement of the operatingmechanism, to electrically connect contacts 3 and 2 or contacts 3 and 1,a switch device carrying a brush adapted, dependent upon the directionof movement to electrically connect contactsj and h or contacts j and'i, said last-mentioned switch being in alinement with the elevatingapparatus, and adapted to be struck and moved by said elevatingapparatus.

4. The combination with an elevating apparatus and an electric motor foroperating the same, a source of currentsupply, electrical connectionbetween the source of curlast-mentioned circuit, a contact as 3 inelectrical connection with one side of said shuntcircuit, a contact as1:111 electrical connection with the other side of said shunt-circuits,contacts as 1 and 2 and h and 1', contact 1 being in electricalconnection with contact h, and contact 2 being in electrical connectionwith contact 2', a brush controlled by the motorcontrolling mechanismand adapted, dependent upon the direction of movement of the operatingmechanism, to electrically connect contacts 3 and 2, or contacts 3 and1, a switch device carrying a brush adapted, dependent upon thedirection of movement, to electrically connect contacts 7 and h orcontacts jand i, said last-mentioned switch being in alinement with theelevating apparatus, and adapted to be struck and moved by saidelevating apparatus, a lever connected with the brush device controlledby the operating mechanism in alinement with the elevating apparatus,and adapted in the movement of the elevating apparatus to be struck byit, returning the brush and the operating mechanism which controls it toits central position.

In testimony of which invention I have hereunto set my hand.

FRANK E. HERDMAN. Witnesses:

O. D. Hovr, J. J OMEARA.

